Today I have time to try all my portable DAP, DAC and Smartphone as SOURCE for my home tube Amplifier .

I would like to share my personal opinion about portable DAP or DAC or Smart Phone as Source for home audio use .

My opinion :
Not always DAP or DAC or Smart Phone are very good in portable use , if we use at our home set up Sound Quality very good too. Sometimes the other way round as result from my experience today .